The name gives just 2N5638, so this 26.3 KB PDF has no board, device or revision information. JEDEC 2N numbering covers discrete parts such as transistors, which means the document is likely a brief datasheet despite its schematic category. Expect pin identification, package type and headline electrical ratings. Such a reference helps when probing a suspect part, choosing an equivalent or confirming orientation during rework. Make sure the code on the component body matches before relying on the listed figures.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.